oss的PHPSDK根本无法使用

我装的镜像服务器（centos+nginx+php)，下载ｏｓｓ　ＳＤＫ 2.0版本
按照这个 http://aliyun_portal_storage.oss.aliyuncs.com/oss_api/oss_phphtml/quickstart.html
写
<?phprequire_once '/path/to/sdk/aliyun.php';use \Aliyun\OSS\OSSClient;$client = OSSClient::factory(array('AccessKeyId' => '','AccessKeySecret' => '',));

$client->putObject(array(
      'Bucket'=>'youxuepai',
      'Key'=> 'effded',
      'Content'=>'This is my content'
      ));
（注：代码中 accesskeyid和accesskeysecret保证正确）
就无法运行，报莫名其妙的错误：

Fatal error:  Uncaught exception'Aliyun\OSS\Exceptions\OSSException' with message 'The bucket you areattempting to access must be addressed using the specified endpoint.Please send all future requests to this endpoint.' in/alidata/www/default/aliyun/src/Aliyun/OSS/Utilities/OSSExceptionFactory.php:16Stacktrace:#0/alidata/www/default/aliyun/src/Aliyun/OSS/ResponseHandlers/OSSErrorResponseHandler.php(29):Aliyun\OSS\Utilities\OSSExceptionFactory->createFromError(Object(Aliyun\OSS\Models\OSSError))#1/alidata/www/default/aliyun/src/Aliyun/Common/Communication/OpenServiceClient.php(40):Aliyun\OSS\ResponseHandlers\OSSErrorResponseHandler->handle(Object(Aliyun\Common\Communication\HttpResponse))#2/alidata/www/default/aliyun/src/Aliyun/Common/Communication/RetryableServiceClient.php(32):Aliyun\Common\Communication\OpenServiceClient->sendRequest(Object(Aliyun\Common\Communication\HttpRequest),Object(Aliyun\Common\Communication\ExecutionContext))#3 /alidata/www/default/aliyun/src/Aliyun/Common/Communication/Retryablein /alidata/www/default/aliyun/src/Aliyun/OSS/Utilities/OSSExceptionFactory.php on line 16